If you have an and are running iOS 18 , you can send and receive texts via satellite when you have absolutely no cellular or Wi-Fi coverage.

: You cannot send photos, videos, or group messages via satellite. Texting Over Wi-Fi

: You must be outside with a clear view of the sky.

: Open the Messages app; a prompt to "Use Messages via Satellite" will appear automatically if you have no signal.

Depending on whether you're trying to fix a reception issue or send a text with no signal, you can manage your iPhone's reception and messaging through the following methods: Checking Precise Signal Strength

If you have Wi-Fi but no cellular reception, you can still send and receive messages: